Richard, did you check into the switch that determines whether the RP250 thinks it's producing output for a mixer or an amp? You had mentioned that from your last experiments with it and I think I remember seeing that too.
i dutifully set that switch depending on what i am connecting to. but the truth is i have no idea what effect it produces, and have been entirely unable to hear any difference.
-- Optimism and pessimism don't exist for me. I'm a blues man. I am a prisoner of hope. I'm going to die full of hope. - Cornel West